Printer&#39;s quoin.



PATENTED SEPT. 1'7, 1907.

Nga. 866,358.

H. A. HEMPEL.

PRINIERS QUOIN.

APPLIoATIoN FILED JUNI: 10.1907.

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HENRY A. HEMPEL, OF BUFFALO, NEW YORK.

PRiN'rERs QUOIN.

Specification of Letters Patent.

Patented sept. i7, 1907.

Application filed .Tune 10,1907. Serial No. 378,123.

To all whom it may concern: k Be it known that I, HENRY A. I-IEMPEL, acitizen of the United States, residing at Builalo, in the county of Erieand State of New York, have invented a new and useful Improvement inPrinters Quoins, of which the ollowing is a specification.

This invention relates to printers quoins of the class consisting of ametallic wedge adapted to bear with its inclined ace against thecorresponding 'face of a companion quoin, the opposing quoins of a pairhaving gear racks with which a pinionkey is engaged for moving thequoins lengthwise on each other to tighten or release them.

The invention has particular reierence to quoins of this kind which areprovided with locking means ior preventing the same from working looseor slipping on each other by the jarring of the printing press,especially when it is run at a high speed or when a form is required tobe used in the press for an unusually long time.

The object of my invention is to provide such quoins with a reliablelocking device which is inexpensive in construction and which in no wayinterferes with their ordinary use. i

In the accompanying drawings: Figure 1 is a side elevation of a pair oquoins embodying one form of the invention.v Fig. 2 is a iace view ofone oi the quoins. Fig. 3 is a longitudinal section in line 3-3, Fig. 1.Fig. 4 is a transverse section in line 4-4, Fig. 3. Fig. 5 4is afragmentary longitudinal section in line 5 5, Fig. 3. Fig. 6 is a viewsimilar to Fig. 3, showing a modied construction of the locking device.Fig. 7 is a transverse section in line 7-7, Fig. 6.

Similar letters oi reference indicate corresponding parts throughout theseveral views.

A and B indicate a pair of quoins each provided on its face or inclinedside with a central longitudinal rib c and at its large end with a heador lug D having a central guide-groove d which receives the rib of thecompanion quoin. As is customary in such quoins the lugs D projectbeyond the ribs e and the lug o each quoin bears against the inclinedface of the opposing quoin. On opposite sides oi the ribs o are arrangedthe usual gear racks f with which the pinion-key, not shown, engages.

The groove d oi each quoin is provided in one of its walls with one ormore locking teeth, faces o1' proj ections d1 which are adapted tointerlock with corresponding teeth, aces or projections c1 formed on theopposing side of the rib of the companion quoin, as shown in Fig. 3, soas to prevent slipping of the quoins on each other when tightened in aform or chase. The grooves d are considerably wider than the thicknessof the ribs c to allow the ribs to move laterally yinto and out ofengagement with the locking teeth d1, and to receive springs g whichtend constantly to press the ribs sidewise into engagement with saidteeth. For this purpose, the spring q oi each quoin is arranged adjacentto the smooth or untoothed wall of the groove d, so that the spring isstrained or deflected by the rib oi the oppos ing quoin upon moving thequoins lengthwise on each other in the direction in which they aretightened.

In the embodiment of the invention shown in Figs. l to 5, inclusive,each spring consists o1 a tapering blade or strip oi spring steel whichis driven into an opening h, preferably oi cylindrical form, arranged inthe large end of the quoin and extending from the back thereof'to theface of the lug D. This spring blade extends forwardly beyond the bottomof the groove, preferably ilush with the face of the lug D, as shown inFigs. 4 and 5, and this projecting portion of the spring is free toyield, while its rear portion is rigidly held in place by the engagementoi its edges with the wall of the opening h.

To facilitate the entrance o the front ends of the ribs between thesprings g and the toothed walls oi the groove d, said ends are taperedor wedge-shaped and the springs are arranged obliquely or at an angle tothe toothed walls, the edges of the springs which face the large ends oithe quoins being nearer said walls than their opposite edges, as shownin Fig. 3.

To obtain the best results, the locking projections d1 of each quoin arepreierably in the form oi ratchet teeth with their abrupt sides facingthe large end of the quoin, as shown in the drawings.

These locking devices, while permitting the quoins of a pair to beshifted lengthwise on each other in the customary manner for tighteningor loosening them, hold the quoins against longitudinal displacementwith suflicient security to prevent their slipping on each other underthe jars or vibrations oi the printing press, thus reliably locking thetype in the form or chase.

It is to be noted that the quoins of a pair may be identical inconstruction, as shown, rendering them interchangeable.

It is only necessary to arrange locking means on that side of each ribwhich faces the toothed wall of the groove of the companion quoin, butif desired, both sides of the rib may be toothed, as shown in thedrawings.

If desired, other forms of springs or yielding holding devices may beemployed :for forcing the toothed rib of each quoin ot' a pair laterallyinto engagement with the toothed wall oi the groove of the companionquoin. For example, in the modification shown in Figs. G and 7, eachspring consists of an approximately U-shaped strip of spring steelarranged substantially parallel with the inclined face of the quoin. Theshank or outer arm g1 of the spring is driven into a saw-keri in theface of the lug D1, while its inner arm is arranged in the groove of thelug and forms an elastic tongue which bears against the side of the ribof'a companion quoin in the same manner as the inst-described spring.

I claim as my invention:-

l. 'lhe combination of a pair of quoins, one having a longitudinal riband the other a guide groove adapted to receive said rib, said rib andthe wall of said groove having interlocking means, and yielding meansarranged to press said rib later-ally against said wall, substantiallyas set forth.

2. The combination of a pair of quoins, one having a longitudinal riband the other a guide groove adapted to receive said rib, said rib beingprovided on its side with means constructed to interlock with theopposing wall of said guide-groove, and a spring for pressing said riblaterally against said wall, substantially as set forth.

3. 'lhe combination of a pair ot quoins, each having a longitudinal riband a lug having a guidegroove adapted to receive the rib of the otherquoin, said ribs being provided ou their sides with locking faces andthe walls of said groove having similar faces adapted to engage withthose of the ribs, and springs arranged in said grooves and acting topress said ribs laterally into engagement with the locking faces ot thegrooves, substantially as set forth.

4. A quoin provided on its face side with a longitudinal rib and a lughaving a groove adapted to receive the rib of an opposing quoin, the riband a wall of the groove having locking faces, and a spring located insaid groove opposite the wall having said locking faces, and arranged topress the rib of an opposing quoin laterally against said wall,substantially as set forth.

The combination of a quoin provided on its face side with a longitudinalrib having locking teeth on its side, a lug having a groove adapted toreceive the 'rib of an opposing quoin and an opening leading to saidgroove adjacent to one of its Walls, the opposite wall of the groovehaving loc-king teeth adapted to interlock with the toothed rib of anopposing quoin, and a spring located in said opening and extending intosaid groove, and arranged to press the rib of an opposing quoinlaterally against said Wall, substantially as set forth.

6. The combination of a quoin provided on its face side with alongitudinal rib, a lug having a groove adapted to receive the rib of anopposing quoin and a cylindrical opening extending from the back of thequoin into said groove,

the rib and one of the walls of said groove having locking faces, .and aspring-blade driven into said opening and extending into said groove,substantially as set forth.

7. The combination of a quoin provided on its face side with alongitudinal rib, and a lug having a groove adapted to receive the ribof an opposing quoin, one et the walls of said groove having lockingfaces, and a spring extending into said groove opposite the \vallthereof having the-locking faces and arranged obliquely to said Wall,substantially as set forth.

S. The combination of a quoin provided on its face side with alongitudinal rib having a tapering front end and a lug having a grooveadapted to receive the rib of an opposing quoin, one of the Walls ofsaid groove having locking faces, and a spring extending into saidgroove opposite the wall thereof having the locking faces and arrangedobliquely to said wall, substantially as set forth.

Witness my hand this 6th day of June, 1907.

HENRY A. HEMPEL.

Witnesses:

C. F. GEYER. E. M. GRAHAM.

